Journal
WATER RESEARCH
Volume 41, Issue 19, Pages 4413-4423Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2007.05.056
Keywords
pharmaceutically active compounds; photodegradation; UV; UV/H2O2; MP; LP; surface water
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A medium-pressure (MP) ultraviolet (UV) system was used to investigate the UV photolysis and UV/H2O2 oxidation of pharmaceutically active compounds (PhACs) that belong to different therapeutic classes and were found to occur in the aquatic environment. The results obtained in laboratory- grade water (LGW) and surface water (SW) were compared with low-pressure (LP) results reported previously. Overall, MP lamps proved to be more efficient to maximize the bench-scale degradation of the selected group of compounds (ketoprofen, naproxen, carbamazepine, ciprofloxacin, clofibric acid, and iohexol) by both UV photolysis and UV/H2O2 oxidation. Fundamental direct and indirect photolysis parameters obtained in LGW are reported and used to model the MP-UV photolysis and MP-UV/H2O2 oxidation of the pharmaceuticals in SW, predicting the experimental results very well. (C) 2007 Elsevier Ltd. All rights reserved.
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